#include <stdio.h>

#define M 6

int main()
{
    printf("hello 1, M:%d\n", M);
    printf("hello 2, M:%d\n", M);
    printf("hello 3, M:%d\n", M);
    //printf("hello  , M:%d\n", M);
    //printf("hello  , M:%d\n", M);
    //printf("hello  , M:%d\n", M);
    //printf("hello  , M:%d\n", M);
    printf("hello 8, M:%d\n", M);

#ifdef V
    printf("hello V\n");
#else
    printf("hello No V\n");
#endif 

    return 0;
}
